Art of casting



ya W J. LE MAY ART OF CASTING Filed Sept. l5, 1950 Dec. 29, 1931.

Patented Dec. 29, 1931 UNITED STATES 1,#.@.Tlaz-rrl OFFICE', f

JOHN LE MAY, or AURORA, ILLINOIS, AssIGNORfTO AURORA METAL COMPANY, OFAURORA, ILLINOIS, A cORroRA'rION OE ILLINOIS ART F CASTING- Applicationled September 15, 1930. Serial- INO.'L182,0021`.

This invention relates to improvements in the art of casting and moreespecially the casting of metal. My invention is especially applicablefor use in connection with die casting under pressure or vacuum inseparable molds.

Among the features of my invention is the provision of a method andmeans for preventing east elongated members from shrinking in length. Inthe casting of grids, and

which Fig. 1 is a view in perspective of a separable mold, Fig. 2 is avertical sectional view of the same, Fig. 8 is a view ltaken asindicated by the line 8 of Fig. 2, Figt is a view similar to Fig. 2showing a modified form, Fig. 5 is a view taken as indicated by the line5 of Fig. 4, Fig. 6 is a view taken as indicated by the line 6 of Fig.l, Fig. 7 is a view similar to Fig. 2 showing a modied form, and Fig. 8is a View taken as indicated by the line 8 of Fig. 7.

As shown in the drawings, the mold of Figs. 1, 2 and 8 is adapted forcasting a grid with the two elongated side members 10, 10,

connected by the branches or bars 11, 11.`

The mold is separable, and includes the two side pieces 12, 12 and thetwo end pieces 18, 13. Any ordinary clamping or other mechanism (notshown) may be employed for holding the parts of the mold together dur-Ving the casting operation which may be facilitated by pressure orvacuum.

In the casting of a piece such as the grid shown, the elongated members10, 10, unless prevented, may shorten upon cooling thus shearing o ordamaging the relatively smaller or lighter branches or connecting bars11, 11. By the use of my invention, such undesirable shortening of themembers 10, is lessened or prevented. This is accomplishedfby providingthe enlarged heads 10, 10a on the ends of the members 10, 10. Theseenlarged heads are here shown as formed in suitable cavities in the endpieces 18, 13 of the mold and they engage the ends of the center pi-eces12, 12 thus holding the members 10, 10 against shortening, anynecessaryshrinkage being permitted by a slight reduction in diameter. The ends ofthe center pieces 12, 12 form shoulders that the heads bear against. I

The mold may be filled in any suitable manner. For example, in the formsshown theA metal may enter through one of the openings in the end piece13.

In Figs. 4, 5 and 6, I have shown a mold for casting another form ofdevice. The principle, however, is the same. As here shown,-

the mold is made to cast a central elongated member 15 with fins 16. InOrder to prevent the elongated member 15 from shrinking in length andshearing oit or damaging the fins 16, I provide the heads 15a, 15a whichengage the ends of the center pieces 17 of the mold. The end pieces 18,18 of the mold are provided with suitable cavities to form the enlargedheads 15a.

The same invention is illustrated in Figs. 7 and 8 in which there isshown a mold for casting an elongated member 20 with the smaller pieces21, 21 attached thereto by the stems or branches 21a. To prevent theelongated member 20 from shortening in length it is vprovided with theenlarged heads 2Oa in the end pieces 22 of the mold. The center piecesof the mold are indicated by 23, 28.

It is obvious that in cases where the elongated member can be removedwithout separation of thecentral part of the mold, said central part mayconsist of only one piece.

VV'hile I have shown and described certain embodiments of my invention,it is to be understood that it is capable of'many modifica-A tions.Changes, therefore, in the construc-V tion and arrangement may be madewithout departing from the spirit and scope of the invention asdisclosed in the appended claim, in which it ismy intention to claim allnovelty inherent in my invention as broadly as possible in view of theprior art.

I claim:

In the art of casting an elongated member with laterally projectingparts, the method consisting of providing a mold having an elongatedcavity with enlarged excess metal cavities at the ends thereof, andintroducing molten metal into said cavities, whereby the elongated castmember formed upon cooling` is prevented from materially shortening anddamaging its laterally projecting parts by the formation of headsthereon in the said enlarged excess metal cavities.

In Witness whereof, I have hereunto set my hand and seal, this 10th dayof September,

JOHN LE MAY.

